Comparison

Solar Eclipse Timer vs Third Light

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Solar Eclipse Timer

This app provides precise countdowns and reminders for solar eclipse phenomena, aiding both casual observers and photographers. It works offline and offers features like automatic partial-phase image timing and a dedicated photographer mode.

Highlights
  • Offline eclipse timing
  • Precise contact time calculation
  • Photographer mode
  • Automatic partial-phase image timing
  • Geolocation and manual coordinate entry
  • Audio and notification tests
Features
Read full description

The Solar Eclipse Timer app is marking its 6th eclipse since 2017, which speaks volumes about its reliability and the trust it has built within the eclipse-chasing community. Helping tens of thousands of people enjoy the eclipse more by being reminded to observe all the fascinating eclipse phenomena. Photographers are aided by down-to-the-second precision and countdowns. Since the 2026 path covers some remote areas as well as high-traffic spots in Spain where cell service could be overwhelmed on eclipse day, the app works offline once unlocked. So, geolocation and contact time calculation are all done within the app. This makes it a true "field tool." The app is free to try, and for only a $1.99 in-app purchase to unlock the 2026 eclipse, it's an easy "yes" for anyone who has invested time and travel to be in the path of totality. In-App Video Tutorial: The first button on the Home Screen provides a comprehensive tutorial that explains all the app's functions and how to use them effectively. Audio and Notification Tests: The second button lets users run a "device sound check" to confirm that audio cues, spoken timings, and notifications are audible, which is critical since the app is designed to talk to you. Practice Session Video: The third button launches a 4-minute-45-second video of my actual eclipse-day observation site in 2024, synchronized with the app's real-time announcements. This allows both observers and photographers to practice their routines repeatedly, such as observing for shadow bands, adjusting shutter speeds, and knowing when to remove solar filters. Additionally, dialogue boxes appear as functions are selected, giving you more guidance. On eclipse day, after you get into the path, you can be timing the eclipse in 3 easy steps: 1. Tap to geolocate. 2. Tap to have the app calculate the precise contact times. 3. Tap to load the times into the timer. That's it! You are timing the eclipse. A major convenience feature of the app is the automatic calculation of the clock times needed to capture a perfect set of partial-phase images before and after totality. It is the only app in the world with this function. Collaborating with the late Fred Espenak (Mr. Eclipse) on Photographers Mode before the 2024 eclipse gives the app an incredible pedigree. For pros who need to stay "in the zone" and only care about timing and countdowns from C1 through C4, this mode is a game-changer. You can manually enter coordinates and save the site as a file. This helps compare multiple potential viewing locations. The app includes a hyperlink to the Solar Eclipse Timer website, which gives access to downloadable worksheets to record your partial-phase image times or the chores you want to do in Photographers mode, as well as my Master Stop Chart to count full and partial camera stops. I have observed and photographed six total solar eclipses and one annular eclipse. The concept of an eclipse “talking” timer was developed by me in 2002. I have been helping people time eclipses for almost 25 years. When you use the app, you will appreciate that it was designed by an eclipse chaser. There is also a link to learn more about my comprehensive eclipse observation and photography book, now in its second edition, titled “Eclipse Day.” The app also has a partial eclipse timing mode. This app is ad-free and does not track any user data. ALWAYS USE EYE PROTECTION DURING THE PARTIAL PHASES OF A SOLAR ECLIPSE! OR EVEN WHEN IT IS BRIGHT! NOT DOING SO CAN CAUSE EYE DAMAGE! We are NOT liable for misuse of the app, causing inaccurate timing, or the lack of eye safety precautions during the observation of a solar eclipse. The "glasses off" and "glasses on" statements are guides based on the calculated contact times. The timing can be affected by your phone's clock and the shape of the shadow due to the edge of the lunar limb. Use the Adjust buttons for Lunar Limb variation time adjustments. Glasses should be ON if it's bright!

About

Third Light

Features
Read full description

This app is a free companion product for Third Light Chorus, the leading digital asset management system built around usability and a great user experience. You will need to have a Third Light Chorus site to use this app. After connecting to your Chorus site, you can capture photo and video content on your mobile device and upload it directly to a folder under your account. You can select from your existing files, or capture new photos and videos within the app and upload them to Chorus via WiFi or using mobile data. The app can resize large files before upload, and manage a queue of uploads in situations where bandwidth is limited. Adding content to your Third Light Chorus site has never been easier or more convenient - Third Light brings together all your files, for all your people. - Authenticate with your Chorus server to securely upload files - Supports native, LDAP and SAML2 logins - Capture photos and videos within the app - Upload existing files from your device - Resize and reduce the size of large files on mobile data connections - Captures GPS location (requires Location Services) when taking photos inside the app. - Fast, modern user interface and high-quality features. - 100% secure and encrypted logins and transfers - Free for everyone in your organization to use

Screenshots

Solar Eclipse Timer4 screens
Third Light4 screens

Verdict

The call

The clearest difference is in-app purchases: Third Light at none against Solar Eclipse Timer's 6. On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Solar Eclipse Timer sells 6 one-off in-app purchases. Third Light asks for nothing beyond the download.

UpkeepUpdate frequency

Solar Eclipse Timer ships an update monthly, Third Light every 2 weeks. The most recent releases landed on September 29, 2026 and September 30, 2026 respectively.

Scorecard1 real difference · 9 level
Solar Eclipse Timer versus Third Light: the parameters behind the verdict, then further details
ParameterSolar Eclipse TimerThird Light
PriceFreeFree
Rating3.8 (560 ratings) — better—
Positive reviews68.4% of reviews—
Number of ratings560 — better—
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.011.0 — better
Further details — not scored
Size231 MB16 MB
Age rating17+4+
DeveloperFoxwood Astronomy, LLC.Third Light Limited

Bugs and requests

Solar Eclipse Timer

Reported bugs

3 issues
  • App crashing when loading timing data
  • Notifications not working when camera is in use
  • Incorrect contact times displayed for some locations

Requested features

5 requests
  • Customizable reminders or timers
  • Automatic time zone and location updates
  • Lunar eclipse support
  • Improved onboarding and tutorial
  • Countdown timer with graphical depiction

Third Light

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Solar Eclipse Timer

One-time6
  • Total - 7/2/19; Chile, Argenti$1.99
  • Total - 12/14/20; Chile, Argen$1.99
  • Total – 12/4/21; Antarctica$1.99
Show 3 more
  • Hybrid – 4/20/23; Australia$1.99
  • Total – 4/8/24; USA, Mexico$1.99
  • Solar Eclipse Timer$1.99
None

Third Light

No in-app purchases

Questions

Is Solar Eclipse Timer free?
Solar Eclipse Timer is free to download, with in-app purchases available.
Is Third Light free?
Third Light is free to download, with no in-app purchases.
Do Solar Eclipse Timer or Third Light have ads?
Neither Solar Eclipse Timer nor Third Light shows ads.
Which is updated more often, Solar Eclipse Timer or Third Light?
Solar Eclipse Timer ships an update monthly, and Third Light every 2 weeks. Most recently, Solar Eclipse Timer was updated on September 29, 2026 and Third Light on September 30, 2026.

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